vibratory bowl feeders, which were driven by an electromagnet (solenoid), were widely used heretofore. These kinds of vibratory bowl feeders are constructed in such manner that a cylindrical or saucer-like vessel, namely a bowl, wherein the machine parts and the other articles are to be stored, may be supported by several sets of plate springs which tilt at a certain angle, that an iron piece, which is stuck to the underside of the bowl, will be made to be vibrated in the vertical direction and simultaneously be put into the angular or horizontal vibration around the vertical shaft, and that the thus resultant vibration in the oblique direction can be transmitted to the bowl. As a result, the machine parts and the other articles standing on call within the bowl are conveyed upwardly along a spiral track provided on the internal circumference while being oriented by some attachments fitted up parallel to the periphery of the above track, thus being carried out of the delivery port at the terminus of the track.